iphone开发UI组件之UIDatePicker日期选择组件的预习

客官°小女子只卖身不卖艺 2022-08-04 14:52 152阅读 0赞

为了省时间，直接上代码吧。

新建工程。

编辑控制器的.h文件如下：

//
    //  ViewController.h
    //  datepicker
    //
    //  Created by apple on 15/9/2.
    //  Copyright (c) 2015年 LiuXun. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface ViewController : UIViewController
    
    @property (nonatomic, strong) UIDatePicker *datePicker;
    @property (nonatomic, strong) UILabel *dateLabel;
    @end

编辑控制器的.m文件如下：

//
    //  ViewController.m
    //  datepicker
    //
    //  Created by apple on 15/9/2.
    //  Copyright (c) 2015年 LiuXun. All rights reserved.
    //
    
    #import "ViewController.h"
    #define  WIDTH    [UIScreen mainScreen].bounds.size.width
    #define  HEIGHT  [UIScreen mainScreen].bounds.size.height
    
    @interface ViewController ()
    
    @end
    
    @implementation ViewController
    
    -(NSDate *) stringToDate:(NSString *)timeStr
    {
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
        return [formatter dateFromString:timeStr];
    }
    
    -(NSString *)dateToString:(NSDate *)timeDate
    {
    
        NSDateFormatter *formatter = [[NSDateFormatter alloc]  init];
        [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
        
        return [formatter stringFromDate:timeDate];
    }
    
    -(void)initDatePicker
    {
        self.datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(20, 20, (WIDTH-20)/2, (WIDTH-20)/2)];
        self.datePicker.datePickerMode = UIDatePickerModeDate;
        self.datePicker.minuteInterval = 5;
        self.datePicker.minimumDate = [self stringToDate:@"1990-01-01 00:00:00"];
        self.datePicker.maximumDate = [self stringToDate:@"2015-08-01 00:00:00"];
        self.datePicker.date = [NSDate date];
        [self.datePicker addTarget:self action:@selector(valueChanged:) forControlEvents:UIControlEventValueChanged];
        
        [self.view addSubview:self.datePicker];
    }
    
    -(void) initDateLabel
    {
        self.dateLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, (WIDTH-20)/2+30, WIDTH, 50)];
        self.dateLabel.textAlignment = NSTextAlignmentCenter;
        self.dateLabel.backgroundColor = [UIColor clearColor];
        self.dateLabel.font = [UIFont systemFontOfSize:21.0];
        [self.view addSubview:self.dateLabel];
    }
    
    -(void) valueChanged:(UIDatePicker *)sender
    {
        self.dateLabel.text = [self dateToString:sender.date];
    
    }
    
    
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        self.view.backgroundColor = [UIColor whiteColor];
        [self initDatePicker];
        [self initDateLabel];
        
    }
    
    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    @end

运行结果如下：

![Center][]

[Center]: /images/20220731/0e4365dc89b744cfbed6ed87c93c328d.png